Here's something to be aware of, if you're in the habit of using a smartphone to share photographs on Twitter or other sites.Handsets such as the iPhone, Blackberry and Android phones can embed GPS coordinates in the data of the photograph, a feature known as geotagging, the Privacy Rights Clearinghouse reminds us. What's the problem with that? Well, folks with a little knowhow and software can use this data to figure out where you've been.And after reading Eileen's post about debt collectors using social media to gather personal information, I'm not so sure I want just anyone knowing about my daily travels. Advertisers are definitely another group that would be interested, according to the clearinghouse.It's not just pictures, by the way ... Various apps and other features of the phone may also be using GPS coordinates and leaving a record that could be accessed in the future, by law enforcement, for example. So what can you do if you want to restrict how your phone collects location information? Check out the instructions for disabling location information on, which has instructions for.So what can you do if you want to restrict how your phone collects location information? Check out the instructions for disabling location information on, which has instructions for.